Add Substrate Material Support to Lumen Performance Overview

There is a discrepancy when inspecting Substrate materials in the Lumen Performance Overview. Compared to viewing non-Substrate materials the overview show all surfaces in red indicating that Lumen is tracing dedicated reflection rays, despite being over the roughness threshold. This is fixed when setting r.Lumen.Reflections.MaxRoughnessToTraceClamp 0

1. Create a default project
2. Open the Lumen Performance Overview
3. Observe materials being properly shown
4. Enable Substrate and reopen the project
5. Open the Lumen Performance Overview and observe the overview showing red for all materials

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